I save plastic containers so I can send home left overs with my daughters and their friends. I used to trust them to bring my plastic ware back, and sometimes it made it back, sometimes it didn't. So now I don't worry about it. They recycle so it is not going into a landfill somewhere.
I just discovered the KFC small containers and fell in love with them - not sure what all they will be used for yet but they are in the cupboard waiting....